package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.lang.reflect.Type;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    //微信服务接口地址
     public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
     @Autowired
     private WeChatProperties weChatProperties;
     @Autowired
     private UserMapper userMapper;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO userLoginDTO) {
        // 调用微信接口服务，获得当前微信用户的openid
        Map<String, String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject= JSON.parseObject(json);
        String openid=jsonObject.getString("openid");
        // 判断openid是否为空，如果为空表示登录失败，抛出业务异常
        if (openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        // 判断当前用户是否为新用户,即openid是否有保存在我们的数据库里
           User user=userMapper.getByOpenid(openid);
        // 如果是新用户，自动完成注册，即添加到用户表中
          if (user==null){
              user =User.builder()
                      .openid(openid)
                      .createTime(LocalDateTime.now())
                      .build();
              userMapper.insert(user);
          }
        // 返回这个用户对象
        return user;
    }
}